[Merge] ~flexiondotorg/ubuntu/+source/ubuntu-settings:master into ~ubuntu-desktop/ubuntu/+source/ubuntu-settings:master

[Sebastien Bacher]

Review: Disapprove

Rejecting, as discussed changing the setting wouldn't resolve the inconsistency, it would still be impossible to interact with elements under the dialog but it would be more confusing because the UI wouldn't communicate that clearly anymore
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https://code.launchpad.net/~flexiondotorg/ubuntu/+source/ubuntu-settings/+git/ubuntu-settings/+merge/377985
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